Potential-indicator.



E. F. GEHRKENS. POTENTIAL INDICATOR. APPLICATION FILED APBJB, 1912.

l, 1 00,723 Patented June23, 1914.

Fig.2.-

Witnesses: Inventori a {4/4 4 Edward FGehr'kens. f w 3 O Hus Attorne g.

STATES PATENT OFFICE.

ELECTRIC COIvIPANY, A CORPORATION'OF NEW' YORK.

'POTENTIAL-INDIGATDR,

lzrtoiiiieed Juno 3.29M.

Applica n filed Aprilfi, 1912. i-fieri-al Nor-589,341.

Specification of Letters kit-cent,

iiOllI'll Wiring of rho riiiuion i9: therein; niuoh :-'i."ni'iiiliiailv m For ii iurihor uminrwmriio'" t mn ruirrrnorin-ur h iz'ui to yanving drawing whoroi1i--- inn-muss onihw yingl' ih femur? \ention nil Fig. :3 is 8! view nl' Eng vol" T0 all whom-1'16 may ooncern Be. it known that I. l'lnwiinn Fr Gnnnmms. a citizen of the United States, residing al Pittsfielcl, county of Berkshire Stnto of l Massachusetts, have invented cvrtain now and useful improvements in lotontial-lndi rotors, of whioh the following a specificalion.

My invention relates, lo apparatus for indicating the voltage or some pwiiolornii1 ml 2 .1 ili-=tant point on'tho lino of :in olortrii: tron lizfllic mi sion circuit and gmrrirularly 0 lii'w drop 3. porn:

romponsators. con iming of a re and lzii ion '[l a roar-inure lll Sex ,M. whim-mi in homo l The bie/CB of my invention are gonorzilly ronutunw T. Su rind in ii A gil w to simplify the installations whore suvh r .w iromiivi l2: f5. componmlors ziro used and mom Kindly rooturi ranking; wlznivwr iiu' irs :1 mmto provide a novel form of indie ,n \Ullable room-"t u'ioinhor l5 i'r'm minsik'c meter to be used in ronnootion with suol rhimgr e n tho voltage of 2! guralotrrmined poini. of the oleotriiinslallution, cooperating 5 a you rntus. In the typo of lino drop (IOlllPOllSililjiS in general use at the present time, our stuzioo and o. reartunco are connected in horn. i number of tops are hroughi' om from hotli. 3 l'GSlflfiDCE a d roactunco to lop i scpnrnio tlial writhing so that tho l' fivlhlil'fifr, and roar-tome in rho a-imuit (ion oorh he s .ll. .y gniiustt-(l in pin-pol to th: of .n& lino on whivli the own is us (i, Ti .o fifllllpeilfilllill'ti sin; Eli-ii; connootion with other oppiiraimi to inilicato the voltage at some prflletorniinoil distant v ii ii control an anw jliii il point on the line, one common t; po of (Gilli i from hoh 4 i moo lllti mitoinfltio voltage w nim'pr: 21ml w mrz im pensator being used with regulators and another with on irioirating voltmeter. The oomponsotors for use with automatic voltage regulators usually provided with ii. conflict making voi'rnietor f The: voltincioi no; l'ho 1mm! 7 liming for controlling; the regulator. The m It a liner ii and pllly'lilfiii with an. mljim annaof the Contact making roltinrlor l? lllJlC smile if; which is mliiptcrl to lac :nlji i l 9,5 tivoly ,small compared with the ltbl' fl' "oi; pin i The LiiJllllflblt. smile the indicating voltinotor anti it has 7 \x'th 1i riilvr l-l, .\'l\l(ll may lm iron found feasible to ronnoct ooth &5 volt: n which nornml for tho of voltmeter to the sanno conqjmrmitorx It;

Hf; urn oonnooleil LUll of the rorrvni' tmmfornior 10/ proridr set at tho pound on iho in for whivh tho mniponsulor has accordingly been onslon'iiiry under the a lju; .7 mo present practice whenover desirable to in- In the o Eil'iilillll of thin apparatus, rho dude in the station equipment in indie-ab ros slanoo t and ro m once 7 are Separately ing voltmeter Which Will give the voltage ad usted in -roportion to the rnsistzinoe and on the line at the, poipt for which the autol'eziolunco of the inn: on which tho componmatic regulator is compensated, to provide sator is to he usod. After thia adjustment thc indicating voltmeter with a separate the voltago ml'oss the contact hiking voltcompensator, so that two componsators are meter 8 Wlll be constant tor a constant voltomployed. By my invention the use of the age at 'thopomt oi (llFlll'll)l.ltl0ll. The former additional compensator for tho indicating voltage will, howevvr, ho than the latter by an amount oqmzl to the drop through the voltmeter is dispensed with and the switchcompen uting device and the; due to the current (lowing in making voltmeter, anrl this loads on the tin In onlvi. therefore, to indicate the zlflkt'ltul voltage at tho p fint of distribution l llrt, tho iiw tin 8) with flat- ,lllillf lfillla" F f51l= hivh \"BlQ i in he FUt m n, to indivzite tho mrrec. norn'r'l voltage. The scale setting: tun I'vuclily be done at'ter tho umnpvnsnting (loving is prop-- oily adjusted. In pi'zict so this scale will he empirically ml} ml. that a 1mm it the desired point of the a; will read the voltage at that poin' Illlll will telcphonc l)?t(fl\". to the station what the Voltage and the atljnstahle scale of tho indirizttm voltmeter will then be. set by the stnti-m :i f ntlrmt accordingly. The "mltinettw will in mute the Voltage of the ystvn= :it the poi t of distribution for whivh 1 w onigmnsatm' is. adjusted l' fglill'tllfi 01 the power fan-tor at the loud lVhnt I Clllll'il as nun will i to. to secure by Letters Patent ot', the United States. is:

l. The combination with an electric installation of a li :a' drop ct'nnponsator, a contact making voltmeter operatively connvcted to tho compensator and responsive to changes in the voltage of the installation, and an indicating voltmeter having an ad- -ot thQ tiyop in he lino ntively connectml to ,or for indicating the value 0t ain; va -l1 vol agu Q. "lhu combination with an electric inttIl ion at .1 ine drop mnnpensntc-r, ml

Contact malt VoltmPtPr and an in livatmg; "whim-er n :ul in-:t: -lw smile C(Jtnlctl'ittl in pm 7 7 l1 each other and in series relation. with {ill tfili 'mrliSittOl, wheregold wntzurt ni'lliing voltnwter is respon- Mw to {)l'txltltti'iflsfi) in the voltage of the installation Ilml t indicating volt-- meter lid the *nluo of such v- ;nlf-fiation with .tn electric distribution sywfimn at n. ine drop "oinpensntor, H1 91! 0?? ml}? v nnwtv l to Silltl cor pomto HftlPtCIlYtlllqkl Chang a 2i prmlotmmi ml po nt i indicating volt motor h: 1114? wsnlv and open atiwlv 1m c mp tutor for indie/zit: a; Mill'li voltage.

In wit'm went 1 have lwreunto set my hnmi lli f .lfih tiny of April, 1912. 

